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7787-70-4

Basic Information
CAS No.: 7787-70-4
Name: Cuprous bromide
Article Data: 169
Molecular Structure:
Molecular Structure of 7787-70-4 (Cuprous bromide)
Formula: CuBr
Molecular Weight: 143.45
Synonyms: Cuprous bromide;Copper monobromide;HSDB 270;UNII-R8V209A5G0;Copper bromide (CuBr);
EINECS: 232-131-6
Density: 4.71 g/mL at 25 °C(lit.)
Melting Point: 492 °C, 765 K, 918 °F
Boiling Point: 1345 °C, 1618 K, 2453 °F
Flash Point: 1345°C
Solubility: slightly soluble in water
Appearance: white powder or crystal
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 22-24/25
PSA: 0.00000
LogP: 0.84310
Synthetic route

dicarbonyl(cyclopentadienyl)methyliron(II)

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: MeBr; room temp. (N2); not isolated, detected spectroscopically;A 81%
B 100%
7789-45-9

copper(ll) bromide

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
With sodium sulfite In water for 0.416667h;96%
Stage #1: copper(ll) bromide With sodium sulfite In water at 20℃; for 0.25h;
Stage #2: With hydrogenchloride; sodium sulfite In water for 0.166667h;
91%
In neat (no solvent) on annealing;;

butyl-η5-cyclopentadienyldicarbonyliron(II)

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: n-BuBr; room temp. (N2); not isolated, detected spectroscopically;A 74%
B 92%

benzyldicarbonylcyclopentadienyliron(II)

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: PhCH2Cl; room temp.(N2); not isolated, detected spectroscopically;A 66%
B 89%

(η5-C5H5)(CO)2FeCH2CH2C(CH3)3

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: Me3CCh2CH2Br; room temp. (N2); not isolated, detected spectroscopically;A 87%
B 87%

(η5-C5H5)Fe(CO)2CH2CH2C6H5

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: PhCH2CH2Br; room temp.(N2); not isolated, detected spectroscopically;A 74%
B 85%

dicarbonyl(η5-cyclopentadienyl)iron(II)(ethyl)

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: EtBr; room temp.(N2); not isolated, detected spectroscopically;A 83%
B 80%
69661-73-0

[(η5-C5H5)(CO)2Fe(sBu)]

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: s-BuBr; room temp.(N2); not isolated, detected spectroscopically;A 67%
B 83%
55102-02-8

(η5-C5H5)Fe(CO)2(threo-PhCHDCHD)

7789-45-9

copper(ll) bromide

A

dicarbonylcyclopentadienylbromoiron(II)

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In dichloromethane byproducts: PhCHDCHDBr; room temp.(N2); not isolated, detected spectroscopically;A 74%
B 82%
31596-92-6

copper OO-diethyl thiophosphate

106-96-7

propargyl bromide

A

3309-78-2

O,O-Diethyl S-propargyl thiophosphate

B

7787-70-4

copper(I) bromide

Conditions
ConditionsYield
In toluene addn. of propargyl halide to Cu(I) thiophosphate in toluene, 20°C, heating to 50°C, 2 h; sepg. CuBr ppt., evapn. of solvent, extg. residue with hexane, evapn. of solvent, chromy. (silica, benzene-ether);A 80%
B n/a
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Specification

1. Introduction of Copper(I) bromide
The Copper(I) bromide with CAS registry number of 7787-70-4 is also known as Cuprous bromide. The IUPAC name is Bromocopper. Copper(I) bromide is a white powder or crystal and should be sealed in cool, ventilated, dry place away from heat and fire. What's more, it is slightly soluble in water.

2. Properties of Copper(I) bromide
Physical properties about Copper(I) bromide are: (1)Exact Mass: 141.847939; (2)MonoIsotopic Mass: 141.847939; (3)Heavy Atom Count: 2; (4)Complexity: 2; (5)Covalently-Bonded Unit Count: 1.

3. Structure Descriptors of Copper(I) bromide
1. SMILES: Br[Cu]
2. InChI: InChI=1/BrH.Cu/h1H;/q;+1/p-1
3. InChIKey: NKNDPYCGAZPOFS-REWHXWOFAY
4. Std. InChI: InChI=1S/BrH.Cu/h1H;/q;+1/p-1
5. Std. InChIKey: NKNDPYCGAZPOFS-UHFFFAOYSA-M

4. Safety Information of Copper(I) bromide
Hazard Symbols:IrritantXi
Risk Codes:
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Description:
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes. 

5. Preparation of Copper(I) bromide
Copper(I) bromide is commonly prepared by reduction of copper(II) bromide with sulfite yields Copper(I) bromide and hydrogen bromide.

2 CuBr2 + H2O + SO32- → 2 CuBr + SO42- + 2 HBr

6. Use of Copper(I) bromide
Copper(I) bromide can be used as analytical reagent, catalyst. Besides, it is employed to convert diazonium salts into the corresponding aryl bromides.

ArN2+ + CuBr → ArBr + N2 + Cu+

7. Other details of Copper(I) bromide
When you are using Copper(I) bromide, please be cautious about it. As a chemical, Copper(I) bromide is irritating to eyes, respiratory system and skin. During using it, do not breathe dust and avoid contact with skin and eyes.